XML 41 R29.htm IDEA: XBRL DOCUMENT v3.20.2
Pensions (Tables)
 6 Months Ended
Jun. 30, 2020
Pensions [Abstract]  
Components of Net Periodic Pension Cost
Components of Net Periodic Pension Cost

 
 
Three Months
Ended June 30
  
Six Months
Ended June 30
 
 
 
2020
  
2019
  
2020
  
2019
 
             
Service cost
 
$
235
  
$
212
  
$
469
  
$
424
 
Interest cost
  
364
   
411
   
728
   
822
 
Expected return on plan assets
  
(800
)
  
(683
)
  
(1,599
)
  
(1,366
)
Amortization of actuarial loss
  
93
   
105
   
185
   
210
 
Amortization of prior service cost
  
(3
)
  
(3
)
  
(6
)
  
(6
)
Rate-regulated adjustment
  
686
   
533
   
1,373
   
1,066
 
Net periodic pension expense
 
$
575
  
$
575
  
$
1,150
  
$
1,150